PIC18LF24K Datasheet, PDF (297/594 Pages) –

PIC18(L)F26/45/46K40
In Forward Full-Bridge mode (MODE<2:0> = 010),
CWG1A is driven to its active state, CWG1B and
CWG1C are driven to their inactive state, and CWG1D
is modulated by the input signal, as shown in
Figure 24-7.
In Reverse Full-Bridge mode (MODE<2:0> = 011),
CWG1C is driven to its active state, CWG1A and
CWG1D are driven to their inactive states, and CWG1B
is modulated by the input signal, as shown in
Figure 24-7.
In Full-Bridge mode, the dead-band period is used
when there is a switch from forward to reverse or vice-
versa. This dead-band control is described in Section
24.6 “Dead-Band Control”, with additional details in
Section 24.7 “Rising Edge and Reverse Dead
Band” and Section 24.8 “Falling Edge and Forward
Dead Band”. Steering modes are not used with either
of the Full-Bridge modes. The mode selection may be
toggled between forward and reverse toggling the
MODE<0> bit of the CWG1CON0 while keeping
MODE<2:1> static, without disabling the CWG module.
FIGURE 24-7:
Forward
Mode
EXAMPLE OF FULL-BRIDGE OUTPUT
Period
CWG1A⁽²⁾
CWG1B⁽²⁾
CWG1C⁽²⁾
Pulse Width
CWG1D⁽²⁾
(1)
(1)
Reverse
Mode
Period
CWG1A⁽²⁾
Pulse Width
CWG1B⁽²⁾
CWG1C⁽²⁾
CWG1D⁽²⁾
(1)
(1)
Note 1: A rising CWG data input creates a rising event on the modulated output.
2: Output signals shown as active-high; all POLy bits are clear.
 2016 Microchip Technology Inc.
Preliminary
DS40001816C-page 297